Do you know what the Noise Reduction Rating (NRR) is for these?
Thanks for posting this info!
sorry no.... but I must have tried just about every ear plug available and these (or similar) are the only ones that are comfortable for hours and cut out the noise. I think I am unusual because one ear canal is smaller than the other and any other type of ear plug was great on the left but terrible on the right and either fell out or hurt like hell. I nearly had some custom jobs made but I lose stuff all the time and these are cheap and effective.
When you pull them out you have a perfect impression of your ear canal!
Well worth trying out for the money - and make sure you follow the instructions and pull the top of your ear up as you insert.... more important than you think.